return SnapshotVisitResult.SKIP_SUBTREE;
        });
        return index;
    }

    public static <T extends FileSystemNode> Optional<MetadataSnapshot> getMetadataFromChildren(ChildMap<T> children, VfsRelativePath targetPath, CaseSensitivity caseSensitivity, Supplier<Optional<MetadataSnapshot>> noChildFoundResult) {

    }

    @Override
    public Optional<MetadataSnapshot> getSnapshot(VfsRelativePath targetPath, CaseSensitivity caseSensitivity) {
        return SnapshotUtil.getMetadataFromChildren(children, targetPath, caseSensitivity, Optional::empty);
    }

    /**
     * Returns an updated node with the same children. The list of children are
     * incomplete, even if they were complete before.

    }

    @Override
    protected Optional<MetadataSnapshot> getChildSnapshot(VfsRelativePath targetPath, CaseSensitivity caseSensitivity) {
        return Optional.of(
            SnapshotUtil.getMetadataFromChildren(children, targetPath, caseSensitivity, Optional::empty)
                .orElseGet(() -> missingSnapshotForAbsolutePath(targetPath.getAbsolutePath()))
        );
    }

    @Override